--- a/dom/gamepad/ipc/GamepadEventChannelParent.cpp
+++ b/dom/gamepad/ipc/GamepadEventChannelParent.cpp
@@ -40,18 +40,18 @@ class SendGamepadUpdateRunnable final : 
 } // namespace
 
 GamepadEventChannelParent::GamepadEventChannelParent()
   : mHasGamepadListener(false)
 {
   RefPtr<GamepadPlatformService> service =
     GamepadPlatformService::GetParentService();
   MOZ_ASSERT(service);
+  mBackgroundThread = NS_GetCurrentThread();
   service->AddChannelParent(this);
-  mBackgroundThread = NS_GetCurrentThread();
 }
 
 mozilla::ipc::IPCResult
 GamepadEventChannelParent::RecvGamepadListenerAdded()
 {
   AssertIsOnBackgroundThread();
   MOZ_ASSERT(!mHasGamepadListener);
   mHasGamepadListener = true;